I cobbeld together a "small" capsule for the Seidenstrasse project with parts i had lying around.
A 1-line backlid alphanumeric display to display the destination is connected to an atMega644 via 8Bit bus.
Also connected to the mega are 3 337 transistors for powering 4 RGB-Leds as postion lights.
The mega is connected via i2c to an WR703 flashed with openwrt and connected via usb is a logitech C270 webcam. The router streams the webcam images with mjpg-streamer to an laptop which streams everything via multicast to the congress network.